/**
 * 对消息进行预处理
 * @param app
 * @returns {(function(*, *): Promise<void>)|*}
 */
module.exports = app => {
    return async (ctx, next) => {
        // console.log(ctx)
        ctx.socket.emit('res', `server >> ${ctx.socket.id} packet received!`)
        console.log('server >> packet >> ', ctx.packet)
        await next()
    }
}